- A9
- B10
- C12
- D15
Step-by-Step Solution
Opposite directions → relative speed = 45 + 63 = 108 km/ m/s. Total length = 300 m. Time = 300/30 = 10 s.
Answer: B) 10
Two trains 120 m and 180 m long are running in opposite directions at 45 km/h and 63 km/h. The time (in seconds) they take to cross each other is:
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